Heating-drum



(No Model.)

0. A. ZETTERSTRAND.

HEATING DRUM.

No. 601,368. Patented Mar. 29,1898.

womtoz UNITED ST TES ATENT FFICE.

OHARLEY A. ZETTERSTRAND, OF HILLSBOROUGH, NORTH DAKOTA.

HEATING-DRUM.

SPECIFICATION forming part of Letters Patent No. 601,368, dated. March 29, 1898.

Application filed October 9, 1896. Serial No. 608,405. (No model.)

To all whom it may concern.-

Be it known that I, OHARLEY A. ZETTER- STRAND, a citizen of the United States, residing at Hillsborough, in the county of Traill and State of North Dakota, have invented a In the said drawings the reference-numeral 1 designates a central pipe connected at top and bottom with approximately cylindricalshaped heads 2. This pipe communicates with the lower of said heads. Inside of and parallel with said central pipe 1 are four pipes 3, which pass 'into said heads 2, said central tube 1 being closed at its upper end, the four inclined pipes 3 opening outside of the heads 2. Communicating with said heads 2 is a series of vertical pipes 4, which are concentric to the said pipe 1. The outer ends of said heads are formed with fiues 5.

The operation is as follows: The lower of said heads is connected with the smoke-pipe of astolve or heater by means of the induction-fines. The products of combustion will enter the lower head and pass into the central pipe 1. They will circulate in this pipe and return to the said lower head and pass up through the vertical pipes 4 to the upper head'2, and from thence through the educotion-flue 5 in said head to another smoke:

pipe leading to a chimney or flue, the draft being upward. During the circulation of the heated products of combustion through said pipes 4 said pipes will become heated and,

through radiation,will heat the room in which the heater is located. At the same time air will enter the pipes 3 at the bottom and, becoming heated, will escape through the pipes at the top.

I am aware that prior to my invention heating drums have been made with vertical pipes. I therefore do not claim such a combination, broadly; but

What I do claim as my invention, and desire to secure by Letters Patent, is

A heating-drum comprising the two heads, a central pipe communicating with the lower head and attached to the'upper head, a series of smaller pipes within the central pipe and passing entirely through the heads, and a series of outer pipes 4:, the opposite ends of each of which enter-[the heads, in combination with the smoke-pipes 5 5, one attached centrally to each head, substantially as described. 1

CHARLEY A. ZETTERSTRAND. Witnesses:

P. L. PRIOHARD, R. N. PRICHARD. 

